Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C573

ICAO 24-bit transponder address · allocated to Korea, South

Currently assigned to HL8573 · BOEING 787-10 Dreamliner

Hex
71C573
Octal
34342563
Decimal
7,456,115
Country
KR
Tail
HL8573
Type
B78X
No current signal · last broadcast 3h ago
Flights observed
222
Distinct callsigns
20
Country
KR
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 71C573.

Country allocation

The ICAO 24-bit address 71C573 falls within the block assigned to Korea, South (KR) by ICAO Annex 10, Volume III. Every aircraft registered in Korea, South receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
KAL071 - 14 2026-07-10
KAL448 - 11 2026-06-28
KAL447 - 10 2026-06-28
KAL072 - 10 2026-07-10
KAL053 - 10 2026-07-06
KAL704 - 8 2026-07-10
KAL054 - 8 2026-07-06
KAL042 - 8 2026-07-13
KAL024 - 8 2026-06-18
KAL970 Korean Air 7 2026-05-16
KAL969 Korean Air 7 2026-05-15
KAL928 Korean Air 7 2026-06-09
KAL724 - 7 2026-07-13
KAL723 - 7 2026-07-13
KAL703 - 7 2026-07-10
KAL402 - 7 2026-07-07
KAL041 - 7 2026-07-13
KAL023 - 7 2026-06-18
KAL927 Korean Air 6 2026-06-08
KAL434 Korean Air 5 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 KAL042 SEA → ICN Jul 13, 20:45 UTCJul 14, 07:30 UTC10h 45m
2026-07-13 KAL041 - Jul 13, 08:15 UTCJul 13, 17:55 UTC9h 40m
2026-07-13 KAL724 - Jul 13, 04:20 UTCJul 13, 05:50 UTC1h 30m
2026-07-13 KAL723 - Jul 13, 01:20 UTCJul 13, 02:40 UTC1h 20m
2026-07-12 KAL076 YVR → ICN Jul 12, 08:10 UTCJul 12, 18:20 UTC10h 10m
2026-07-11 KAL075 ICN → YVR Jul 11, 14:15 UTCJul 11, 23:50 UTC9h 35m
2026-07-10 KAL072 YVR → ICN Jul 10, 22:00 UTCJul 11, 08:05 UTC10h 5m
2026-07-10 KAL071 - Jul 10, 19:20 UTCJul 10, 19:50 UTC30m
2026-07-10 KAL071 - Jul 10, 10:20 UTCJul 10, 12:10 UTC1h 50m
2026-07-10 KAL704 - Jul 10, 05:15 UTCJul 10, 07:10 UTC1h 55m
2026-07-10 KAL703 ICN → NRT Jul 10, 01:40 UTCJul 10, 03:30 UTC1h 50m
2026-07-09 KAL076 YVR → ICN Jul 9, 08:10 UTCJul 9, 18:25 UTC10h 15m
2026-07-08 KAL075 ICN → YVR Jul 8, 14:25 UTCJul 8, 23:30 UTC9h 5m
2026-07-07 KAL402 SYD → ICN Jul 7, 22:45 UTCJul 8, 08:55 UTC10h 10m
2026-07-07 KAL401 ICN → SYD Jul 7, 10:45 UTCJul 7, 20:40 UTC9h 55m
2026-07-06 KAL054 - Jul 6, 23:30 UTCJul 7, 08:30 UTC9h 0m
2026-07-06 KAL053 - Jul 6, 20:20 UTCJul 6, 20:35 UTC15m
2026-07-06 KAL053 - Jul 6, 12:30 UTCJul 6, 14:20 UTC1h 50m
2026-07-05 KAL072 - Jul 5, 22:10 UTCJul 6, 08:55 UTC10h 45m
2026-07-05 KAL071 ICN → YVR Jul 5, 10:10 UTCJul 5, 19:20 UTC9h 10m
2026-07-05 KAL704 - Jul 5, 05:20 UTCJul 5, 07:20 UTC2h 0m
2026-07-05 KAL703 ICN → NRT Jul 5, 01:35 UTCJul 5, 03:30 UTC1h 55m
2026-07-03 KAL072 - Jul 3, 22:10 UTCJul 4, 09:00 UTC10h 50m
2026-07-03 KAL071 ICN → YVR Jul 3, 10:10 UTCJul 3, 19:15 UTC9h 5m
2026-07-02 KAL042 SEA → ICN Jul 2, 20:45 UTCJul 3, 07:35 UTC10h 50m
2026-07-02 KAL041 ICN → SEA Jul 2, 08:30 UTCJul 2, 17:35 UTC9h 5m
2026-07-02 KAL724 KIX → ICN Jul 2, 04:00 UTCJul 2, 05:25 UTC1h 25m
2026-07-02 KAL723 - Jul 2, 01:00 UTCJul 2, 02:30 UTC1h 30m
2026-06-28 KAL448 - Jun 28, 17:19 UTCJun 28, 21:04 UTC3h 45m
2026-06-28 KAL447 - Jun 28, 10:30 UTCJun 28, 14:34 UTC4h 5m
2026-06-28 KAL918 ZRH → ICN Jun 28, 04:40 UTCJun 28, 05:09 UTC30m
2026-06-27 KAL918 ZRH → ICN Jun 27, 18:20 UTCJun 28, 03:55 UTC9h 35m
2026-06-27 KAL917 - Jun 27, 03:40 UTCJun 27, 15:14 UTC11h 35m
2026-06-27 KAL917 - Jun 27, 02:29 UTCJun 27, 02:45 UTC15m
2026-06-25 KAL054 - Jun 25, 23:39 UTCJun 26, 08:54 UTC9h 15m
2026-06-25 KAL053 - Jun 25, 13:00 UTCJun 25, 14:39 UTC1h 40m
2026-06-25 KAL922 - Jun 25, 10:09 UTCJun 25, 10:30 UTC20m
2026-06-24 KAL922 - Jun 24, 22:04 UTCJun 25, 09:25 UTC11h 20m
2026-06-24 KAL921 - Jun 24, 04:10 UTCJun 24, 18:50 UTC14h 40m
2026-06-23 KAL471 - Jun 23, 00:24 UTCJun 23, 11:54 UTC11h 30m
2026-06-22 KAL448 - Jun 22, 16:29 UTCJun 22, 20:00 UTC3h 30m
2026-06-22 KAL447 - Jun 22, 10:44 UTCJun 22, 14:24 UTC3h 40m
2026-06-21 KAL042 - Jun 21, 20:40 UTCJun 22, 07:14 UTC10h 35m
2026-06-21 KAL041 ICN → SEA Jun 21, 08:15 UTCJun 21, 17:50 UTC9h 35m
2026-06-20 KAL881 ICN → ICN Jun 20, 23:50 UTCJun 21, 05:04 UTC5h 15m
2026-06-19 KAL072 YVR → ICN Jun 19, 22:24 UTCJun 20, 08:44 UTC10h 20m
2026-06-19 KAL071 ICN → YVR Jun 19, 10:14 UTCJun 19, 19:49 UTC9h 35m
2026-06-18 KAL024 - Jun 18, 20:10 UTCJun 19, 07:14 UTC11h 4m
2026-06-18 KAL023 - Jun 18, 07:25 UTCJun 18, 17:30 UTC10h 5m
2026-06-18 KAL938 - Jun 18, 02:55 UTCJun 18, 03:15 UTC20m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the HL8573 page for operator, model, and routing details .

Mode-S 71C573 frequently asked

What is Mode-S code 71C573?
71C573 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8573.
Where is Mode-S 71C573 registered?
Mode-S code 71C573 is allocated to Korea, South (KR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 71C573 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C573, octal 34342563, decimal 7,456,115.
What flights does 71C573 operate?
Mode-S 71C573 has broadcast 20 distinct callsigns, including KAL071, KAL448, KAL447, KAL072, KAL053.